BIOTA Philippines Conference System, 52nd BIOTA Annual National Convention and Scientific Sessions

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ALLELOPATHIC EFFECT OF DURANTA REPENS L. LEAF LEACHATE ON THE GROWTH AND DEVELOPMENTAL STAGES OF ROTTBOELLIA COCHINCHINENSIS (LOUR.) W.D. CLAYTON
Wally Bonghanoy Escaro

Last modified: 2017-03-13

Abstract


ABSTRACT - Allelopathy has been receiving greater recognition as an alternative and organic weed management strategy. Allelochemicals present in plants could be used to manage weeds without environmental risk as well as to supplement chemical herbicides usage. When susceptible plants are exposed to allelochemicals, germination, growth and development may be affected. A laboratory experiment employing Relay Seedling Technique was conducted to determine the allelopathic effect of Duranta repens L. leaf leachate on the growth and developmental stages of Rottboellia cochinchinensis (Lour.) W.D. Clayton. The sensitivity of the weed on the leaf leachate treatments (3%, 6% and 12%) was evaluated in terms of percentage germination, shoot and root length, percentage inhibition, and other abnormal morphological features of shoots and roots. Based on the results of the study, the type of germination observed in Rottboellia cochinchinensis (Lour.) W.D. Clayton is hypogeal and its developmental stages vary among treatments. It also revealed that as the concentration of leaf leachate treatments increases the percentage germination, shoot and root length decreases. Several abnormal plant morphological features such as the retarded radicle, shoot and root development, reduced shoot and root length, blackening and swelling of the roots, curling of shoot and root axis, and lack of lateral roots and root hairs were also observed. It is therefore concluded that Duranta repens L. leaf leachate has an allelopathic effect on the growth and developmental stages of Rottboellia cochinchinensis (Lour.) W.D. Clayton as manifested by higher percentage inhibition, lower percentage germination and several abnormal plant morphological features. This present study will be a viable economic opportunity for the community especially to the farmers as it provides relatively cheaper and ecofriendly solutions to weed problems.

Keywords: Allelopathy, Rottboellia cochinchinensis (Lour.) W.D. Clayton, Duranta repens L., leaf leachate, growth and developmental stages


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